It's a physics puzzle game where each level is split across 2 planets that each fill the screen. You need to guide our rather forgetful alien explorer, Bob, back to where he parked his spaceship (with his hazard lights on, of course). But you can only teleport him to the same position on the opposite planet, so you’ll need to carefully plan your route, flipping between planets as you go.

Later levels involve teleporting other objects such as giant space magnets (which really switch up the gameplay and puzzle-solving!) and even other rather spiky aliens.